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3 years ago

6

Two charged balls are 10 cm apart. One is positively charged, and the other is negatively charged.

1 answer:

asambeis [7]3 years ago

8 0

Answer:Explanation: The field lines of the electric charges extend from the positive to negative side charge. ... The force between the two charged balls is attractive. It is directly proportional to the product of their charges and inversely proportional to the magnitude of the distance between them.

Explanation:

hope this helps

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ArbitrLikvidat [17]

Answer

given,

height = 300 m

speed of aircraft = 40 m/s

propeller rotation = 20 rev/s

moment of inertia = I = 70 Kg/m²

mass = 200 Kg

since no non conservative force act on system, the mechanical energy is conserved after propeller fall off.

by conservation of energy

$E_i = E_f$

$mgh + \dfrac{1}{2}mv_i^2 + \dfrac{1}{2}I\omega^2_i=\dfrac{1}{2}mv_f^2 + \dfrac{1}{2}I\omega^2_f$

as there is no air resistance ωi = ωf

$mgh + \dfrac{1}{2}mv_i^2=\dfrac{1}{2}mv_f^2$

$v_f=\sqrt{v_i^2 + 2gh}$

$v_f=\sqrt{40^2+ 2\times 9.8 \times 300}$

$v_f=86.48\ m/s$

b) the rotation rate of the propeller remains same as there is no air resistance.

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Determine the kinetic energy of 650 kg roller coaster car that is moving with a speed of 20.0 miles per second?

mestny [16]

Answer:Ek=673.109 kJ

Explanation:

Use equation for Kinetic energy: Ek=m*V²/2

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Ek=m*V²/2

Ek=650kg*(32.18m/s)²

Ek=(650kg*1053.55m²/s²)/2

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